THEORETICAL APPROACH FOR IMPROVING THE VEHICLE ROBUST STABILITY AND MANEUVERABILITY BY ACTIVE FRONT WHEEL STEERING CONTROL

Abstract

The unstabilization of limit-oversteer vehicles depends heavily on the saturation characteristics of the rear cornering forces. In this paper, an anti-spin condition of vehicles under the saturation characteristics of the rear cornering forces is examined from the view point of robust stability control. Then, an active front wheel steering control system satisfying the anti-spin condition is designed by H^∞ control. Furthermore, vehicle maneuverability is improved by adaptive control approach.